fix: poll option view using wrong dark mode background color issue

Mastodon/Scene/Share/View/Content/PollOptionView.swift

@@ -82,7 +82,7 @@ final class PollOptionView: UIView {
 extension PollOptionView {
     private func _init() {
         // default color in the timeline
-        roundedBackgroundView.backgroundColor = Asset.Colors.Background.systemGroupedBackground.color
+        roundedBackgroundView.backgroundColor = Asset.Colors.Background.secondarySystemBackground.color
         
         roundedBackgroundView.translatesAutoresizingMaskIntoConstraints = false
         addSubview(roundedBackgroundView)
@@ -193,6 +193,11 @@ struct PollOptionView_Previews: PreviewProvider {
                 PollOptionView()
             }
             .previewLayout(.fixed(width: 375, height: 100))
+            UIViewPreview(width: 375) {
+                PollOptionView()
+            }
+            .preferredColorScheme(.dark)
+            .previewLayout(.fixed(width: 375, height: 100))
         }
     }
     

Mastodon/Scene/Share/View/TableviewCell/PollOptionTableViewCell.swift

@@ -129,14 +129,16 @@ struct PollTableViewCell_Previews: PreviewProvider {
             }
             .previewLayout(.fixed(width: 375, height: 44 + 10))
         }
+        .background(Color(.systemBackground))
     }
     
     static var previews: some View {
         Group {
-            controls.colorScheme(.light)
-            controls.colorScheme(.dark)
+            controls
+                .colorScheme(.light)
+            controls
+                .colorScheme(.dark)
         }
-        .background(Color.gray)
     }
     
 }